John kay



KAY.

Roller Ahstractors for Lever Watches.

Patented April 14; 1874.

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JOHN KAY, OF INDIANAPOLIS, INDIANA.

IMPROVEMENT IN ROLLER-ABSTRACTERS FOR LEVER-WATCHES.

Specification forming part of Letters Patent No. 149.760, dated April14, 1874; application filed January 28, 1874.

To all whom it may concern:

Be it known that I, JOHN KAY, of the city of Indianapolis, county ofMarion, State of Indiana, have invented a Itoller-Abstracter forLever-\Vatches, of which the following is a specification the partsattached to the staff.

Every watch-maker knows the extreme diffi culty there is in taking theroller oif the staff without injuring; either balance-wheel, roller,

or staii, or loosenin g the staff in the balance wheel. Especially isthis true in a compensating balance; and in many Swiss lever-watches theroller is placed so close. down to the hub of the balance that it makesit even more difficult to take the roller off without injury to thewatch. WVith my roller-abstracter, no matter how awkwardly the roller isset, or how tight it is fastened to the staff, it comes ofi' easily andsafely.

In the accompanying drawings, Figure l is a perspective elevation of myroller-abstracter, shown in connection with the staff, roller, &c. Fig.2 is a sectional elevation of the same.

A is the body of the abstracter, made of any suitable material andshape, 'and having a hole drilled longitudinally through it. The upperpart of the hole is smaller in diameter,and forms the nut in which thescrew B works. To the lower end of B is attached, by a swiveljoint, b,the sliding spindle O, fitting closely the larger parallel hole drilledin A. The lower part or nipple of G is made smaller in diameter andtapering, the extreme end having a shallow conical hole sunk in itscenter to receive the end of thewatch-staff. This nipple can either bemade solid with the spindle O or detachable. D D are springlegs fastenedto A at the top, and having feet 01 turned in, as shown, and shaped tofit under the roller. The legs D can be adjusted to suit differentdiameters of staff and rollers by the screw E and nut e, an elongatedslot, 0, being cut in G to allow the spindle to work up and down withoutinterfering with the screw E. f is the watchstaff, to which is attachedthe roller F and balance-wheel G.

The operation of my abstracter can be best described by referring to thedrawings. The abstracter is shown there as adjusted ready to force thestaff through the roller. One or two turnson the screwB is sufficient,and the roller is detached, leaving the balance-wheel on the staffintact. By having a hollow nipple to re ceive the staff, and placing thefeet to clamp the lower end of the staff, my abstracter can also be usedto force the roller on. By lowering the nipple 0, it would carry beforeit the roller F to any point desired, the spindle rising within thenipple.

I claim as my invention 1. The adjustable spring-legs D, with invertedfeet 01, in combination with the sliding adjustable spindle 0, movingbetween, and independently of, the said spring-legs, substantially asspecified.

2. The sliding spindle C, with slot 0 and solid or detachable nipple 0,working within the guide out in A, the screw B, and swivelpoint 1),working within the guide and nut in A, in combination with theadjustable spring legs D, with feet (1, the screw E, and nut 6, arrangedsubstantially as described, and for the purpose specified.

JOHN KAY. Witnesses:

HUG-H P. STEWART, J AMES H. FISHER.

